I would say that is often the norm.
I would not say that it is however desirable.
What you need to do is ask yourself "What is the benefit
of re-reading the data in the buffer over and over?"
When a database has a high Buffer Hit Ratio it will also have a
large number of LIO's, and the reason is poorly written SQL
that reads the same data from the cache, over and over.
There papers at hotsos.com that will explain this in detail.
Jared
| Prem Khanna J <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED] 08/12/2003 03:44 AM
|
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> cc: Subject: Re: quick suggestions for tuning ? |
Jared,
LIO being high and BHCR ~ 99% : is this is a normal or abnormal ?
Regards,
Jp.
12-08-2003 00:44:23, Jared Still <[EMAIL PROTECTED]> wrote:
>But his BCHR is 99.57% !
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